140664559 has 4 divisors (see below), whose sum is σ = 160759504. Its totient is φ = 120569616.

The previous prime is 140664551. The next prime is 140664569. The reversal of 140664559 is 955466041.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 140664559 - 2³ = 140664551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140664551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10047462 + ... + 10047475.

It is an arithmetic number, because the mean of its divisors is an integer number (40189876).

Almost surely, 2^140664559 is an apocalyptic number.

140664559 is a deficient number, since it is larger than the sum of its proper divisors (20094945).

140664559 is an equidigital number, since it uses as much as digits as its factorization.

140664559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20094944.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 140664559 is about 11860.2090622383. The cubic root of 140664559 is about 520.0697132867.

The spelling of 140664559 in words is "one hundred forty million, six hundred sixty-four thousand, five hundred fifty-nine".